Grinding and polishing machine of the rotary-tool type



Sept. 13, 1949. A. E. HAMILTON 3 9 GRINDING AND POLISHING MACHINE OF THE ROTARY-TOOL TYPE Filed Oct. 8, 19 7 10 Sheets-Sheet 1 Inventor ALFRED E. HAMILTON pfic 13,. E%% A. E. HAMiLTON 2,481,588

GRINDING AND POLISHING MACHINE OF THE ROTARY-TOOL TYPE Filed Oct. 8, 1947 10 Sheets-Sheet 2 l U Enventor ALFRED E. HAMILTON u @MM Sept. 13, 1949. A. E. HAMILTON 2,481,588

' GRINDING AND POLISHING MACHINE OF THE ROTARY-TOOL TYPE Filed Oct. 8, 1947 10 Shee'ts-Sheet 3 Z'mnentor ALFRED E. HAMILTON (Ittorneg Sept. 13, 1949. A. E. HAMILTON GRINDING AND POLISHING MACHINE OF THE ROTARY-TOOL TYPE 10 Shea LS-Sheet 4 Filed Oct. 8, 1947 5%. -mmml: m

im lllillllllllMllllllllllli Mlllll v Zhwentor ALFRED E. HAMILTON attorney Sept. 13, 1949. A. E. HAMILTON 2,481,533

GRINDING AND POLISHING MACHINE OF THE ROTARY-TOOL TYPE Filed Oct. 8. 1947 10 Sheets-Sheet 6 jgq, ZSnuentor 121 ALFRED E. HAMILTON Gttorneg Sept. 13, 1949. A. E. HAMILTON 2,431,583

GRINDING AND POLISHING MACHINE OF THE ROTARY-TOOL TYPE Filed Oct. 8, 1947 -lO Sheets-Shet '7 IN VEN TOR.

BY ALFRED E. HAMlLTON Sept. 13, 1949. A. E. HAMBLTON GRINDING AND POLISHING MACHINE OF THE ROTARY-TOOL TYPE 10 Sheets-Sheet 8 Filed Oct. 8, 1947 INVENTOR. ALFRED E. HAMILTON septa 13 19499 A. E. HAMILTGN 2,481,58

GRINDING ND POLISHING MACHINE OF THE ROTARY-TOOL TYPE Filed on. a, 1947 10 Sheets-Sheet 9 INVENTOR. ALFRED E. HAMILTON mwwzzh Sept, 13, 194% A. E. HAMILTON GRINDING AND POLISHING MACHINE 01" THE ROTARY-TOOL TYPE 16 Sheets-Sheet 10 Filed 001;. 8, 1947 INVENTOR. ALFRED E. HAMILTON ATTORNEY Patented Sept. 13, 1949 UNITED STATES PATENT-("OFFICE GRINDING AND POLISHING MACHINE OF THE ROTARY-TOOL TYPE Alfred E. Hamilton, Pittsburgh, Pa. I

Application October 8, 1947, Serial No. 778,554

20 Claims.

This invention relates to machines for grind.- ing and polishing strip steel, sheets, etc., of the type of machine described and claimed in my application Serial No, 759,012, filed July 5, 1947. The present application, however, discloses various improvements and modifications in structure and method of operation, not found in the previous application.

One object of the present invention is to provide an improved means for imparting vibratory and reciprocatory movements to surfacing rolls or drums, in lateral directions relative to the strips or sheets being operated upon, in a manner not only to effect uniform surfacing, without pattern effects, but to effectively utilize substantially all of the abrasive material on the drum surfaces, no matter at what angle the drums are set relative to the path of travel of the strips or sheets, the reciprocating movements being automatically controlled in accordance with the widths of the strips.

Another object of my invention is to provide an improved manner of supporting the surfacing drums in roll housings, whereby the housings at each end of the rolls can be so shifted as to permit convenient insertion and removal of the rolls and their bearings into the housings.

Another object of my invention is to provide an improved means for effecting vertical adjustments of the surfacing drums relative to one another, either to vary the roll pass or the pressure of the drums against one another, or to facilitate removal of one or both of the drums from the roll housings.

Still another object of my invention is to provide an improved manner of angularly adjusting the roll housings and their surfacing rolls to ad justably fixed positions relative to the path of travel, and without disturbing the mechanism for effecting reciprocatory and vibratory movements of the roll stands.

In the accompanying drawings, Figure l is an end elevational view of a machine embodying my invention, partly in section; Fig. 2 is a sectional view of the machine taken on the line lIII of Fig. 3: Fig. 2A is an enlarged plan View showing the pawl device that is employed for adjusting the roll standsabout a vertical axis; Fig. 3 is a vertical sectional View of the machine on an en- 'iarged scale taken on the line TIL-III of Fig. 2; Fig. 3A is an enlarged fragmentary view showing the manner in which the movable bases for the roll stands are adiiu-stable relative to the stationary sub-base: Fig. 4 is a view end elevation showing the manner in which the divided roll housings at each end of the rolls can :be :senareiterl to ne'rirrit placement and removal of the various parts 01f the machine omitted tor (clarity: .Fig. 5 is an enlarged sectional view through that portion of the meehanism of Fig. ,2

which effects combined vibratory and reciprocay m v e o the ro l stand; his 6. is a st ll further g d iew taken n t lin V f i Fig- 7 is a p n view showing he trams t i rpos d be ween t s ationary so ob o t e ac in an the m abl ba es tor the r us g Fig. is a schematic ew showing the manne i h ch scrubbin hos s and. g i o s ono iono wit respect to he Surfacing um usin s; Fig- 9 is an enlarged sootional w hr ug one o the sc ubbin boxes of ma F g, 0 .5 end v ew s wi o of the scrubbing, xes nd ert ca guide ro s; s- 11 is a pla ew o he struotur l o Fi l9; g. 2 isa ide olevational iew showing meoha h rpe at g a witch that oontrols'a eve s ing motor for reciprocating the rollstands transversely of the path oi strip travel Fig, 1;; is an end View eo partly n seotion; Fig. 4. hows a f catio o a portio of th struo uro of. 12; g-.15 hows still another mod fication t nd Fialfi is a chemat c lan view s owing relative positions oi he str and sur c g drums. when. the roll h sings and th i olls are dia on lly pos onedwi h respec to the P h f strip tra el.

I w b ndersto d ordina ly th re w l be a plu ality of sets oi rindi g roll or drums n a train th oushwhio the strip is pa sed- S nce these set o o s will e i approxim tely h same form, only one s 1; need be here described as a indin and poli hing u it: he rinds and p l shin un t com rise a sta iona y sub: base hav n te th 1. ar ang d t one nd a a ack i r us in otatably r ansii a ly ad u n the o stand hat wi l be ereina ter desc ib A ame l4 (Fi s. and 7) is supported th ase l2 and is hel in'oen alized po t t eon by a p vot stud i The t ams has a extension plate or bracket l5 scoured thereto t o nd w ch carr es stud 15 (F gs 2:2A) for a e s le at het han le or lever 11 whi h has a paw I a fo engagement ith he to th is when it is desired to impart some rgtative movem t to the ram 4. or ju ting the ol stan relative to the path of strip travel. The ratchet l! is reversible so as to rotate in either direction. A row of anti-frictiohrol'lers I8 is journaled on each side of the frame I, to afiord ver tical support for an intermediate reeiprocab'le base I9, the base being provided with shield plates Ma and bars 191) that are engagedhythe roiiers. Rollers 21 are mounted in the frame 14,011 vertical axes, to serve as antirfri'ction guide elements and resist any lateral thrust of the reciprocating base 19 to bev explained more fully later.

Bolts 2.0a extend downwardly t ou h holes 2 i s. 3A and 7) inea 'co ne of am l4 n to slot 22 ex end-ins si e-liar line in the ba e l2, 'The l-ots o e vode ovt to eso e the the frame I4 at a given center regardless of :its

angular displacement with respect to the stationarybase l2. 7. 1 I 1,

A roll housing base 23 is supported upon the intermediate reciprocable base l9, byanti-fri'ction balls 24, so that the roll housing can be vibrated and reciprocated axially of the rollsor surfacing drums, upon the intermediate reciprocable base I9, by means to be hereinafter described. I I.

The roll stand comprises a pair of housing members 26-'-21 forsupporting the surfacing drums at one end, and at the other end there'is a, nair of similarly arranged housin members'28-29. In each instance these pairs of housings'are vertically divided, so that .one housing member of each pa r may be slid on its supporting base to release the bearings that support the roll shafts, as hereinafter explained. When the housing member are in engagement, they are locked a ainst axial displacement, by keyways 26a and 2% (Fig. 4). Thehousing members are detachably attached to the base 23 by screws3| and 32 that extend through a hardened plate 33 which isinterposed between the roll housing and the base 23 and is in turn connected to the base by small screws 34 (Fig.3). f I a A motor base plate 35 is hingedlymounted on the topof. the roll housings and carries electric motors 3B and 31 thatdrivethe surfacing-drums r rolls. through belts 38 and 39 that respectively pass around pulleys 4| .and 42 which are conpected to the-shafts'of the surfacing rolls 43 and 44 res ectively. Atensioning arm and roll 40'is provided for the belt 38 (Fig. 1). These rolls 43,44 may suitably-be ,of the pneumatic drum type faced with abrasive sleeves. or. helically wound abrasivestrips as in my Patent 2.368.760 or my appl cation Serial No. 655.485, filed March 19, 1946. and issued as Patent No. 2,448,884. on September '7, 1948, for example.

As shown more'clearly in Fig. 3, the bearings at the ends of the roll shafts are supported in bearing blocks 45 an d 4,6 that have .verticalf adjustment in the roll housings 26.2'|'-28-'-29. these bearing blocks havethreaded bushings 41 ri idily mounted therein and having threaded engagement with spindles 48.which, are reversely threaded as between their u per and lower portions. so that upon turning of the spindles the roll shafts will b moved toward or awav from one another in symmetrical relation, to the path of travel of the strlpmetal 49 upon which the abra sive rolls operate.

The s indles '48 ,are proviaed with gear wheels and 52 on their upper ends, at the endsof'the r011s.-,,An intermediate gear wheel 53 is interposed between each-pair of gear wheels 5| and 52, to impart driving motion from each gear'wheel 5|to its associated gear Wheelj52.

' The spindles which carry thegear wheels 5| also'carry wormfgears 54 that are driven by a worm 55; The shaft of the Worm 55 isprovided with a spur gear 56 that is driven 'by'a spur gear 51 whichin turnis 'drivenfrom'amotor'58 by sprocket 58a. In this 'way the surfacin drums 43-44 can be moved vertically toward one another and apart, either simply to effect separation of the rolls orto bring them into closer i a- 4 tionship to one another and thereby exert a de-' sired grinding pressure on the strip 49.

In order to separate the. half-housing members; 21 and 29 from their matinghousing members 26 and 28, the screws 3| are first removed; then belts; 38 and 39 are removed from pulleys 4| and 42.. Screw rods 60 that have threaded engagement;

with the housing members 26 and 28 and arejournalled in thehousing members 2|29 are rotated to slide these housin members on theplate '33, to thereby separate the bearing blocks 45 and the bearing blocks 46, as shown more clearly in Fig. 4. This releases the shaft bearings 6| and 62 so that the rolls and their shafts can be lifted free of the housing by lifting-chain hooksthat will engage the shafts between discs 63 and the bearings 6|62. The entire motor housing assembly 59 is hinged to housing members 26 and 28 and can be tilted upwards and held in this position by its motor housing stop 59w. Thedrums 43 and 44 are thus free'to be lifted up between the housing members 2628 and 21-29 and removed.

Guides 'for the strip 49 are provided. at either or'both sides of the roll stand (Figs. 8 to 11) and each comprises upright members 64 that supporthorizontal rollers 65, and also supporting verticalv guide rollers 66 at eachedge of the strip, that are adjustably bolted in a slotted member 66a so as to accommodate any desired width of sheet,

The rollers 65 and member 66w are carried by V a bracket 66?) which is adjustable about a horizontal axis as indicated in Fig. 10, so that when they are used at the ends of a roll train, they can be tilted to guide a strip to or from coilers that are positioned at planes lower than the roll pass. The strips such'as 49 will sometimes be moved throughthe rolls in one direction, and at other times, in the opposite direction, and are passed through scrubbingiboxes 69: These boxe contain-spray pipes 69a and 6%. Water or other liquid is directed through'these spray pipes in angular directions, to remove grit from the strip. Thus when a scrubbing box is mountedbetween roll stands as shown schematically in Fig. 8,- the jets at 69a will clean the strip of grit left thereon by a preceding pair of surfacing drums, before it enters the pass of the next roll stand, when the strip is traveling in the direction of the arrows in'Fig. 8. When the strip is traveling in the opposite direction; the jets at BSb will remove the grit therefrom. The use of the jets between roll stands is of importance; because they will remove loose coarse grit left by one rollstand, before the strip enters a roll stand wherein the surfacing drums have finer grit. At the ends of the roll stands, the jets will remove grit from the strip before it is'wrapped on the coiler. A drain pipe'69c is provided forthe detritus.

In order that the strips may be wet-ground, spray'pipes 61-68 are provided for wetting the surfaces thereof with oil or water. The wet grinding will prevent overheating of the drums and also prevent floating dust.

" The base member 23 and the roll housing are given combined reciprocating and oscillating movement longitudinally of the roll axes, in a manner similar to the reciprocatory and-vibratory'movement shown in my Patent No. 2,269,197. In this case, a somewhat different form of mechanism is shown for this purpose. The mechanism shown in Figs. '5 and 6 involves a link 10 '5 J2 that :(s, in turn, mounted {on the base member :19. lever is pivotally supported intermediate its ends :by .a pin H3 and holes are provided. at 14 to afford vertical adjustment of the lever and thereby permit a variation in the throw of the link 1n.

The :mechanism :for effecting the combined reciprocating-oscillating movement of the roll .stands riszdnlven by .a motor 515. 'The motor drives bevel :gearing :15 and .a worm :H .as shown Fig.5. The worm H :meshes a worm gear "I8 (shown more clearly -in Fig. 6) which rotates within bushing rings ':'l8a and 18b. Mounted eccentricaily in the wonn wheel 18 is .a '1'9'ont0 which .is fjourna'l-ed a gear wheel 8.0. .As worm gear .118 :is rotated, it carries gear wheel E around in a circular path in mesh with interfinally-toothed gear ring :81. The .gear ring :81 is bolted :in a stationary position to the housing and is mounted concentrically :to the worm gear 18. As the :gear wheel :80 is rotated around the :gear ring .81, it is also in meshed engagement with, and rotates, a gear wheel :82 which .is :selcured to a 83. The shaft 083 is mounted leccentnicavlly within the worm wheel 18 and rotates within the bushing rings 83d. 'On each end of the shaft 83 are crank-like extensions Thus, as worm gear 18 rotates, the shaft 8-3 which mounted eccentrically to it moves bodlly in a circular path thereby imparting one slow, single reciprocating thrust to links "84 during each complete revolution of the worm wheel. Simultaneously the shaft 83 is being rotated by gear wheels '82 and 80, through its movement around the internal gear ring '84. This causes rotation of the crank extensions 85 and also imparts an oscillating movement, or a series of short, rapid thrusts to the links =84. This dual reciprocating-osciliatin'g motion serves to 'convey to the housing members, through the base 23 and bearings 24, a lateral movement comprised simultaneously of a long but relatively slow cycle broken by a series of short but rapid cycles.

The movements above referred to are primar-ily tor the purposeof providing a smooth and. unpa'tter-ned finish on the steel strip. There is stillanother movement imparted to the roll housing and the rolls in a direction transversely of I the path of strip travel-which is provided in order that substantially all of the abrasive material on the rolls or drums will "be operative upon the strip, "even though the strips are of narrow width relative to the lengths of the surfacing drums. This later mentioned movement avoids excessive waste of abrasive material and alsoenables use of the surfacing drums'over longer periods of time and less frequent shutting down for replacement of abrasive strips or sleeves on the drums.

A motor '80 (Fig. 2) is mounted on the base Ill and drives a screw shaft 9! which is journale'd in bearings =92 and 93 that are also carried by the base '81. The shaft I9 has threaded engagement at 94 with the frame 14. The motor 90 is of the reversible type so that the shaft Iii can be driven alternately in opposite directions to effect reciprocation of the base 19 on the frame 14. The length .or distance of reciprocating movem'ents will be regulated in accordance with the width of strip steel that is being operated upon.

As shown in Figs. 12 and 13, the means .for effecting reversals of the motor .910 and the screw shaft 51 in accordance with the width of strip .steel that is being ioperatedmpon comprises :a

reversing switch 186 having wired {connection-with the motor-.flflgand camied by aabraoket 9.1 that is, in turn, rmounted upon the gear case 12. Rollers .98 are journalied on the bracket. 1% Zbar -95 has track grooves in its upper and lower edges and is movable between the rollers .98.

Ah arm 193 :is pivotally connected .at 1 04 to -the bar .89 and is normally-supported .in approximately horizontal position by a plate that is screwed to the end of the bar 99. -A oamm-ing" rail tilt .is carried .by {the arm 4'03 and as the arm is moved back .and :forth with the bar :99, the rail engages and disengagesa .roller UH to oscillate .a switch lever or .arm {11.2 to operate the switch 96 and thereby .efiect reversals of the motor .90.

The ,arm .I U343Xt811d5 across thepathof travel .of the strip, and .above thepass line through the surfacing .drums and has .a .pairof .slots 105 that .adjustably support .a pair of rollers 10:1 in posi- .tion to be engaged .by the .edges of the strip steel during reciprocation .oi the roll stands; The rollers 1 131 .are supported on .the arm 1313 by hangers 'lllB through screw 109 extends, the screw also extending through the slots 'lfliland having threaded engagement with nuts I10 whereby the rollers can be set at adjusted ,positions depending upon the angularity of the surfacing drum housings with respect to the path of strip travel. When the surfacing drums are positinned directly crosswise oi the strip, the rollers ltll'l will be placed farther apart than when the surfacing drums and their housings are, positioned diagonally of the-path ofstrip travel as in 16, in order that approximately all of the abrasive surfaces of the drums will engage the strip.

During back and forth travel .of the base f9 through reversals of the screw .94, the rollers IOi'l will "alternately be brought into engagement with the edges of the Upon each such engagement,the arm Hi3 'will'b'e shifted to operate the switch 5'6, thus provifi g for automatic reversals of the motor 90 and the screw 94. The arm T63 can be moved away from the roll housings by swinging it upwardly about its pivot HM, away from its supporting'plate "H35.

In Fig. 14, a somewhat different arrangement is shown, such arrangement comp-rising a pair of magnetic switches I "I 2 that are adjustably .moun'ted on the arm H33. These switches will be actuated through breaking of the magnetic field by the edges of the strip during reciprocation of the surfacing rolls, the motor "96 thereby being .1 riodica'lly reversed.

In Fig. 1'5, I show pairs of photo-electric cells .11 ll 1'5 and 1;l61.|'1 that are carried by the arm 1 K3, the strip serving, to break the beam betweenthese cells at about'the ends of the reel-pro catory travels oi the roll housings, to thereby effect reversals oicurrent through the m0tor. .9l).

In order to prevent giammlfg of the screw 34 when the motor .96, along with its base .IB and the roll housings. .is being reciprocated and there is no strip steel present to efiect automatic operation of the reversing switches of Figs. 12 to 15,1 provide means shown in Fig. :5, for effecting ,r-eversals of the motor and the screw at points short of those at which the screw would become jammed. These reversals are effected at points a somewhat greater distance apart than the widest points of normal adiustmentof the switch- .operating-elements of Figs. .12 to 15.

A5 show-n 5, the neciprocatl-ng :base 1:9 carries the motor 9 :has a switch-'opmtating :bar [18 slidably mounted thereon in guides" 'I I9, A bracket 120 is secured to the base member I4 and carries a finger l2l that extends upwardly past the bar H8, in position to engage collars l22 and I23 that will shift the bar I l 8 during recipiroeating movements of the base l9 and the drum housings by the screw 94. The bar operates a switch arm I24 through 'camming'action on a switch lever I25, which correspond to the switch members 96 and 102 of'Fig; 12, to thereby effect reversals of themotor90. 1

1 The strip material will be passed through the surfacing drums in any'suitable manner, as for "example by thecoiling and uncoiling reels as 'disclos ed'in my said application ser; No. 759,012.

I claim as my invention: ,I 1. A roll stand for a pair of rolls mountedin approximately superposed relation, comprising a pair of bearing housingsat each end'of the stand, verticallyaspaced bearing blocks in each housing, positionedto cooperate with the bearing blocks of theadjacent housing,'to supportthe ends of vertically-spaced roll shafts, when the housings at each end of the'stand are in proximity to each other, a base for the housings, and a screw-operated device for sliding one of the roll housings on the base,1 at each end of the stand, for releasing the roll shafts.

'2. A roll stand for a pair of rolls mounted in approximately superposed relation, comprising a pair of bearing housings at each end of the stand, Vertically-spaced bearing blocks in each housing, positioned to cooperate withthe bearing blocks of the adjacent housing, to supportthe ends of vertically-spaced roll shafts, when the housings at each end of the stand are. in proximity to each other, a'base for the housings, a screw-operated device for sliding one of the roll housings on the base, at eachend ofv the stand, for releasing the roll shafts, and means for simultaneously adjusting the bearing blocks at each side of the roll stand, toward and .from one another, when the housings are in shaft-supporting position.

3. Apparatus for surfacing traveling strip material, comprising a roll stand, a surfacing drum mounted therein for rotative movement on a strip that is being surfaced, means for recipro eating the drum transversely of the path of strip travel, and meansactuated by the'strip edges for controlling the lengths of reciprocatory strokes.

4. Apparatus for surfacing traveling strip material, comprising a roll stand, a surfacing drum mounted therein for. rotative movement on a strip that is being surfaced, means'for adjusting the roll stand about an axis perpendicular tothe plane of the strip, means for reciprocating the roll stand transversely of the path of strip travel, and means actuated by the strip edges for controlling the lengths of reciprocatory strokes.

5. Apparatus for surfacing traveling strip material, comprising 'a roll stand, a surfacing drum mounted therein for rotative movement on a strip that is being surfaced, means, for adjusting the roll stand about an axis perpendicular to the plane of the strip, means for reciprocating the roll stand transversely of the path of strip travel, and means actuated by the strip edges for controlling the lengths of reciprocatory strokes, the last-named means being adjustable axially of the drum. V F i 6. Apparatus for surfacing traveling strip material, comprising a roll stand, a surfacing drum mounted therein for rotative movement on a strip that is being surfaced, a fixed support a screw Jotatable on the support and having threaded '-connection with the roll stand, for reciprocating the stand in directions transverseto 'the'path of strip travel, a reversible member for Idriving'the screw, and means actuated by. the strip, for periodically reversing the said member in accordance with the width of the strip.

7. Apparatus for surfacing traveling stripma- 8. Apparatus for surfacing traveling strip material and the like, comprising a roll stand a rotatable abrasive drum rotatably carried by the stand, a base for the roll stand, means forrotatably adjusting the base about an axis that is perpendicular to the plane of the material to be operated upon, a motor carried by the base, a

sub-base for the roll stand, an element driven by the motor and having connection with the subbase, for eifecting reciprocating movements of the roll stand and its base relative to the subbase and transversely of the path of strip travel.

9. Apparatus for surfacing'traveling strip material and the like, comprising a roll stand a rotatable abrasive drum rotatably carried by the stand, a base for the roll stand, means for rotatably adjusting the base about an axis that is perpendicular to the plane of the material to be operated upon, an element driven'by' the motor and having connection with the sub-base, for efiecting reciprocating movements. of the roll .stand and its base relative to the sub-base and transversely of the path of strip travel, the motor being reversible and the saidelement having a screwthathas threaded connection with the sub-base.

' 7 10. Apparatus for surfacing traveling strip material and the like, comprising a rollstand a rotatable abrasive drum rotatably carried by the stand, a base for the roll stand, a sub-base, an intermediate base between the other two bases,

means for adjusting the intermediate base on'the sub-base, about an axis vertical to the plane of the material to be operated upon, a motor carried by the intermediate base, a reciprocating device connected to the intermediate base and to the sub-base and driven by the motor, for reciprocating the intermediate base and the roll stand, and means for oscillating the first-named base on the intermediate base, the saidreciprocating and oscillating movements being in directions axially of the surfacing drum.

11. Apparatus forsurfacing traveling strip material and the like, comprising a roll stand a rotatable abrasive drum rotatably carried by the stand, a base for the roll stand, a sub-base, an

intermediate base between the other two bases, .means for adjusting the intermediate basefon the sub-base, about an axis vertical to the plane of a the material to be operatedupon, a motor carried by the intermediate base, a reciprocating device connected to the intermediate base and to .the

sub-base and driven by the motor, for reciprocating'the intermediate base andthe roll stand, a second motor -on the intermediate base, and a driving connection between the second motor and the first-named base, for imparting combined 0'scillatory and vibratory movements to the firstnamed base relative to the intermediate base, the reciprocating, oscillatory and vibratory movements all being in directions axially of the surfacing drum.

12. Apparatus for surfacing traveling strip material and the like, comprising a sub-base, a frame rotatably adjustable on the base, about a vertical axis, an intermediate base carried by the frame and adjustable therewith, a third base movable on the intermediate base, a roll stand on the third base, a surfacing drum rotatable in the stand, to operate upon the material, and means for imparting reciprocatory movements to the intermediate base and combined oscillatory and vibratory movements to the third-named base, in directions axially of the surfacing drum.

13. Apparatus for surfacing traveling strip material and the like, comp-rising a sub base, a frame rotatably adjustable on the base, about a vertical axis, an intermediate base carried by the frame and adjustable therewith, a third base movable on the intermediate base, a roll stand on the third base, a surfacing drum rotatable in the stand, to operate upon the material, and means for imparting reciprocatory movements to the intermediate base and combined oscillatory and vibratory movements to the third-named base, in directions axially of the surfacing drum, the said two means for imparting the reciprocating and combined oscillatory and vibratory movements comprising motors that are mounted on the intermediate base.

14. Apparatus for surfacing traveling strip material and the like, comprising a sub-base, a frame rotatably adjustable on the base, to fixed positions about a vertical axis, an intermediate base carried by the frame and rotatable therewith about said axis, a motor on the intermediate base, a connection between the motor and the said frame for imparting horizontal reciprocating movements to the intermediate base relative to the frame, a third base movable on the intermediate base, means for imparting oscillatory movements to the third base, in horizontal directions, relative to the intermediate base, a roll stand on the third base, and surfacing drums on the roll stand, for operating upon the material.

15. Apparatus for surfacing traveling strip material, comprising a roll stand, a rotatable abrasive drum on the roll stand, to operate on the strip, mechanism for reciprocating the stand and the drum in directions transversely of the path of strip travel, means controlled by the edges of the stri during reciprocating movements of the stand, for limiting the lengths of reciprocatory strokes, and means effective when no strip material is present, for periodically effecting reversals of said mechanism, to confine the said reciprocating movements within predetermined distances.

16. Apparatus for surfacing traveling strip material, comprising a roll stand, a rotatable abrasive drum on the stand, to operate on the strip, mechanism for reciprocating the stand and the drum in directions transversely of the path of strip travel, means controlled by the edges of the strip, during reciprocating movements of the stand, for limiting the lengths of reciprocatory strokes, means effective when no strip material is present, for periodically effecting reversals of said mechanism, to confine the said reciprocating movements within predetermined distances, and a device operative in the absence of a strip in the roll pass, for automatically reversing the motor at approximately the greatest possible extent of screw movement in either direction.

1'7. Roll supporting and driving apparatus comprising a pair of housings, a bearing in each housing, a roll having its ends respectively supported in said bearings and removable vertically from the housings, in an upward direction, a motor base pivotally supported on the upper ends of said housings, and a motor on said base and having detachable driving connection with the roll, the base being movable about its pivot to expose the said roll for vertical removal from between the housings.

18. Roll supporting and driving apparatus comprising a pair of housings that are laterally separable at their upper ends, hearings in said housings for supporting a pair of rolls in superposed relation, a motor base extending across the upper ends of said housings and pivotally mounted on one of the housings, and a motor on said base having detachable driving connections with the said rolls, the base being movable about its pivot from a position above said rolls, to expose said rolls for removal thereof from the housings.

19. Roll supporting and driving apparatus comprising a pair of housings, a bearing in each housing, a roll having its ends respectively supported in said bearings and removable vertically from the housings, in an upward direction, a motor base removably supported on the upper ends of said housings, and a motor on said base and having detachable driving connection with the roll, the base being removable to expose the said roll for vertical removal from between the housings.

20. Apparatus for surfacing traveling strip material and the like, comprising a roll stand, a pair of vertically-spaced bearing blocks in each end of the roll stand, each block being in the form of vertically divided halves, a pair of surfacing drums mounted in the bearings for rotative movement on the upper and lower surfaces of the material, a pair of vertical spindles extending through the bearing blocks at each end of the stand and each spindle having screwthreaded connection with two of the verticallyspaced half blocks, the threads near the upper and lower ends of the spindles being reversely arranged relative to each other, and means for rotating the spindles, to vertically adjust the bearing blocks relative to the path of strip travel, the roll stand being divided at the vertical plane of the drum axes, for separation of its parts and separation of the bearing blocks, to release the drums.

ALFRED E. HAMILTON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 708,967 Miller et al Sept. 9, 1902 2,252,877 Baldenhofer Aug. 19, 1941 2,302,120 Hamilton Nov. 17, 192

FOREIGN PATENTS Number Country Date 3.468 Great Britain Oct. 25, 1873 683,199 Germany Nov. 1, 1939 

